"wooden" feeling legs

I've managed to ride 38 km at a pretty much hardcore pace yesterday and my legs feels like wood today. What one should do then ?? Drop down another 20-25 km the very next day at a slow pace or a complete rest is much better ? My brain wants to go out today but I can tell my legs don't want to,they feel pretty sore...

Specialized Tarmac Sworks
Canyon Spectral 8.9
Canyon Spectral 8.9
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Gary Fisher HKEK (for commuting)
If you over do it when they are screaming the overall recovery takes longer!
I buy a litre tub of milk and have alot of milkshakes after, but it really helps.
However, I think they are a bit tricky because you actually have to ride at a very low intensity. The risk is you'll end up going harder than "recovery pace" due to either the demands of the terrain or your enthusiasm for being out on the bike.
The biggest help I've found for stopping sore legs after a hard ride is eating within 20 minutes of the finish of the ride. Specifically 4:1 carbs to protein - I usually just have beans on toast or a couple of fried egg sarnies.
Think of a recovery ride as nothing more than a brief warm-up.